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Abstract:

In the field of communications, an information processing method, device,
and system are provided. The information processing method includes:
receiving Precoding Control Indications (PCIs); determining a target PCI
according to statistics of the PCIs and/or sources of the PCIs; and
performing uplink Multiple Input Multiple Output sending control
according to the target PCI. A User Equipment and an information
processing system are also provided.

Claims:

1. An information processing method, comprising: receiving Precoding
Control Indications (PCIs); determining a target PCI according to at
least one of statistics of the PCIs and sources of the PCIs; and
performing uplink Multiple Input Multiple Output sending control
according to the target PCI.

2. The method according to claim 1, wherein the receiving the PCIs and
determining the target PCI according to the statistics of the PCIs
comprises: receiving multiple PCIs sent by all or part of cells in an
uplink Enhanced Dedicated Channel (E-DCH) active set; and collecting
statistics of cell signal strength of the cells and determining the PCI
sent by the cell of the strongest cell signal strength as the target PCI.

3. The method according to claim 1, wherein the receiving the PCIs and
determining the target PCI according to the statistics of the PCIs
comprises: receiving multiple PCIs sent by all or part of cells in an
E-DCH active set; and collecting statistics of reception quantities of
the multiple PCIs and determining the PCI of the largest reception
quantity as the target PCI.

4. The method according to claim 1, wherein the receiving the PCIs and
determining the target PCI according to the statistics of the PCIs and
the sources of the PCIs comprises: receiving multiple PCIs sent by all or
part of cells in an E-DCH active set; and collecting statistics of
reception quantities of the multiple PCIs, and, if more than one PCI has
the largest reception quantity, determining the PCI sent by a serving
E-DCH cell from the PCIs having the largest reception quantity as the
target PCI.

5. The method according to claim 1, wherein the receiving the PCIs and
determining the target PCI according to the sources of the PCIs
comprises: receiving a PCI sent by a serving E-DCH cell and determining
the PCI as the target PCI.

6. The method according to claim 1, wherein the receiving the PCIs and
determining the target PCI according to the sources of the PCIs
comprises: receiving multiple PCIs sent by all or part of cells in a
serving E-DCH radio link set, performing soft combination of the PCIs,
and determining the PCI obtained through the soft combination as the
target PCI.

7. The method according to claim 1, wherein after the determining the
target PCI, the method further comprises: sending the target PCI to a
network side.

8. A User Equipment (UE), comprising: a receiving unit, configured to
receive Precoding Control Indications (PCIs); a determining unit,
configured to determine a target PCI according to at least one of
statistics of the PCIs received by the receiving unit and sources of the
PCIs received by the receiving unit; and a controlling unit, configured
to perform uplink Multiple Input Multiple Output sending control
according to the target PCI.

9. The UE according to claim 8, wherein: the receiving unit is configured
to receive multiple PCIs sent by all or part of cells in an Enhanced
Dedicated Channel (E-DCH) active set; and the determining unit is
configured to collecting statistics of cell signal strength of the cells
and determine the PCI sent by the cell of the strongest cell signal
strength as the target PCI.

10. The UE according to claim 8, wherein: the receiving unit is
configured to receive multiple PCIs sent by all or part of cells in an
E-DCH active set; and the determining unit is configured to collecting
statistics of reception quantities of the multiple PCIs and determine the
PCI of the largest reception quantity as the target PCI.

11. The UE according to claim 8, wherein: the receiving unit is
configured to receive multiple PCIs sent by all or part of cells in an
E-DCH active set; and the determining unit is configured to collecting
statistics of reception quantities of the multiple PCIs, and, if more
than one PCI has the largest reception quantity, determine the PCI sent
by a serving E-DCH cell from the PCIs having the largest reception
quantity as the target PCI.

12. The UE according to claim 8, wherein: the receiving unit is
configured to receive a PCI sent by a serving E-DCH cell; and the
determining unit is configured to determine the PCI received by the
receiving unit as the target PCI.

13. The UE according to claim 8, wherein: the receiving unit is
configured to receive multiple PCIs sent by all or part of cells in a
serving E-DCH radio link set; and the determining unit is configured to
perform soft combination of the multiple PCIs received by the receiving
unit and determine the PCI obtained through the soft combination as the
target PCI.

14. The UE according to claim 8, further comprising: a sending unit,
configured to send the target PCI determined by the determining unit to a
network side.

15. An information processing system, comprising a User Equipment (UE)
connected to at least one NodeB in a communicable mode, wherein: the UE
is configured to receive Precoding Control Indications (PCIs) generated
by the NodeBs, determine a target PCI according to at least one of
statistics of the PCIs and sources of the PCIs, and perform uplink
Multiple Input Multiple Output sending control according to the target
PCI.

Description:

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of International Application No.
PCT/CN2009/071800, filed on May 14, 2009, which is hereby incorporated by
reference in its entirety.

FIELD OF THE INVENTION

[0002] The present invention relates to the field of communications, and
in particular, to an information processing method, device, and system.

BACKGROUND OF THE INVENTION

[0003] Currently, Multiple Input Multiple Output (MIMO) is adopted in the
downlink transmission of a Wideband Code Division Multiple Access (WCDMA)
system. Specifically, a User Equipment (UE) calculates Precoding Control
Indication (PCI) information according to received pilot information and
feeds back the PCI information to a current serving NodeB. The serving
NodeB performs MIMO scheduling on the downlink data according to the
received PCI information and the condition of the NodeB.

[0004] In an existing WCDMA system, a UE can send uplink data to a network
side through only one antenna and cannot use a multi-antenna technology
to send uplink data.

SUMMARY OF THE INVENTION

[0005] Embodiments of the present invention provide an information
processing method, device, and system. The embodiments of the present
invention adopt the following technical solutions.

[0006] An information processing method includes:

[0007] receiving PCIs;

[0008] determining a target PCI according to statistics of the PCIs and/or
sources of the PCIs; and

[0009] performing uplink MIMO sending control according to the target PCI.

[0010] A UE includes:

[0011] a receiving unit, configured to receive PCIs;

[0012] a determining unit, configured to determine a target PCI according
to statistics of the PCIs received by the receiving unit and/or sources
of the PCIs; and

[0013] a controlling unit, configured to perform uplink MIMO sending
control according to the target PCI.

[0014] An information processing system includes a UE which is connected
to at least one NodeB in a communicable mode, where:

[0015] the UE is configured to receive PCIs generated by the NodeBs,
determine a target PCI according to statistics of the PCIs and/or sources
of the PCIs, and perform uplink MIMO sending control according to the
target PCI.

[0016] With the information processing method, device, and system
according to the embodiments of the present invention, the UE is able to
receive PCIs and determine a target PCI for uplink MIMO sending control,
so that the UE is able to send uplink data using a multi-antenna
technology, which effectively increases the transmission rate of uplink
data.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To better explain the technical solution of embodiments of the
present invention or the prior art, the accompanying drawings required in
the description of the embodiments or the prior art are briefly described
hereafter. Apparently, the accompanying drawings illustrate only some
exemplary embodiments of the present invention and persons skilled in the
art can derive other drawings from these drawings without creative
efforts.

[0018] FIG. 1 is a flow chart of an information processing method
according to an embodiment of the present invention;

[0019] FIG. 2 is a schematic structure diagram of a network system adopted
by another information processing method according to an embodiment of
the present invention;

[0020]FIG. 3 is a schematic structure diagram of a UE according to an
embodiment of the present invention; and

[0021]FIG. 4 is a schematic structure diagram of an information
processing system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solution of embodiments of the present invention is
described clearly and completely in the following with reference to the
accompanying drawings. Apparently, the embodiments herein are only a part
rather than all of the embodiments of the present invention. Based on the
embodiments of the present invention, persons skilled in the art can
derive other embodiments without creative efforts and such other
embodiments all fall within the protection scope of the present
invention.

[0023] As shown in FIG. 1, an embodiment of the present invention provides
an information processing method, including the following steps.

[0024] Step 101: Receive PCIs.

[0025] Step 102: Determine a target PCI according to statistics of the
PCIs and/or sources of the PCIs.

[0027] According to the information processing method provided in the
embodiment of the present invention, PCIs are received and a target PCI
is determined for uplink MIMO sending control, so that a UE is able to
send uplink data using a multi-antenna technology, which effectively
increases the transmission rate of uplink data.

[0028] In steps 101 and 102 in the embodiment of the present invention,
the UE may receive multiple PCIs sent by all or part of cells in an
uplink Enhanced-Dedicated Channel (E-DCH) active set. Then, the UE may
collect statistics of cell signal strength of these cells and determine
the PCI sent by the cell of the strongest cell signal strength as the
target PCI; or the UE may collect statistics of reception quantities of
the PCIs and determine the PCI of the largest reception quantity as the
target PCI; or the UE may first collect statistics of the reception
quantities of the PCIs and then, if more than one PCI with the largest
reception quantity exists, determine the PCI sent by a serving E-DCH cell
in the PCIs of the largest reception quantity as the target PCI.

[0029] In steps 101 and 102 in the embodiment of the present invention,
the UE may receive a PCI sent by the serving E-DCH cell and determine the
PCI as the target PCI.

[0030] In steps 101 and 102 in the embodiment of the present invention,
the UE may receive multiple PCIs sent by all or part of cells in a
serving E-DCH radio link set and perform soft combination of the PCIs,
and determine a PCI obtained through the soft combination as the target
PCI.

[0031] In the embodiment of the present invention, that the UE receives
multiple PCIs may include following circumstances: (1) at least two of
the PCIs received by the UE have different values; and (2) at least two
of the PCIs received by the UE have the same value. The value of a PCI is
determined by a network side. For example, the PCIs sent by cells in the
serving E-DCH radio link set are the same; the PCIs sent by cells in the
E-DCH active set and the PCIs sent by cells outside the serving E-DCH
radio link set may be different and may also be different from PCIs sent
by cells in the serving E-DCH radio link set.

[0032] Optionally, in the embodiment of the present invention, the UE may
send the determined target PCI to the network side. For example, the UE
may send the target PCI and relevant uplink data to the network side.

[0033] An embodiment of the present invention provides another information
processing method, including the following steps.

[0034] Step 201: A UE receives PCIs sent by a network side.

[0035] In a WCDMA system, an E-DCH active set is a set of cells that
provide E-DCH bearers for a UE. As shown in FIG. 2, cell 1, cell 2, cell
3, and cell 4 are cells in the current E-DCH active set of the UE, where
cell 1 and cell 2 are cells in a serving E-DCH radio link set which is a
set of cells from which the UE may receive and combine relative grant
information. Cell 1 is a serving E-DCH cell of the UE, that is, a cell
where the UE may receive absolute grant information. A UE has one and
only one corresponding serving E-DCH cell.

[0036] In the embodiment of the present invention, PCIs may be generated
by NodeBs controlling the cells in the E-DCH active set and sent by all
cells in the E-DCH active cell. For example, PCIs are generated by NodeB
1 and NodeB 2 shown in FIG. 2 and sent by cell 1, cell 2, cell 3, and
cell 4. The PCI generated by a NodeB in the active set of the UE may be a
PCI most favorable to the NodeB, for example, a PCI that enables maximum
receive power when the NodeB acts as a receiver. The PCIs generated by
different NodeBs may be the same or not the same. For example, the PCI
generated by NodeB 1 is sent by cell 1 and cell 2, and therefore the PCIs
sent by cell 1 and cell 2 are the same; the PCI generated by NodeB 2 is
different from the PCI generated by NodeB 1, and therefore the PCIs sent
by cell 3 and cell 4 are the same but are different from the PCIs sent by
cell 1 and cell 2.

[0037] Definitely, in the embodiment of the present invention, PCIs may be
generated by only NodeB 1 controlling the serving E-DCH cell and sent by
the serving E-DCH cell or serving E-DCH radio link set. For example, the
PCI is only sent by cell 1 or sent by cell 1 or by both cell 1 and cell
2.

[0038] It should be noted that, in a soft handover process, the UE may
communicate with multiple E-DCH cells, and a Radio Network Controller
(RNC) in the network side may select one or more NodeBs controlling cells
in the E-DCH active set according to a preset selecting policy to
generate PCIs for the UE, and the generated PCI is sent by all or part of
cells in the E-DCH active set. For example, the RNC may select a NodeB
controlling a cell in the E-DCH active set to generate a PCI for the UE
and the PCI is sent by all or part of cells in the active set of the UE,
thereby increasing the flexibility for the UE to determine the target
PCI. For another example, the RNC may select the NodeB controlling the
serving E-DCH cell to generate a PCI for the UE and the PCI is only sent
by the serving E-DCH cell of the UE, so that the UE performs uplink MIMO
sending control under the control of the serving NodeB while the downlink
channel resources and power resources of other cells in the active set
are saved. Accordingly, the UE receives only the PCI sent by the serving
E-DCH cell and may determine the PCI as the target PCI and perform uplink
MIMO sending control according to the target PCI. For another example,
the RNC may select a NodeB controlling the serving E-DCH radio link set
to generate a PCI for the UE and the PCI is sent by the serving E-DCH
radio link set of the UE, so that the PCIs sent by cells in the serving
E-DCH radio link set are the same, which increases the reliability for
the UE to receive the PCI.

[0039] Furthermore, the PCIs have a mapping relationship with weighting
factors of antennas on the UE side. Therefore, the network side provides
the weighting factors of antennas on the UE side to the UE through the
PCIs and the UE implements uplink MIMO sending control after acquiring
information of the weighting factors of antennas according to the PCIs.
In the embodiment of the present invention, assuming that two antennas on
the UE side exist, where the weighting factor w1pref of the
first antenna is a constant, for example

w 1 pref = 1 2 , ##EQU00001##

where the value of w1pref is pre-configured on the UE and the
NodeB; and the weighting factor w2pref of the second antenna
can be selected from a set, for example:

[0040] Because the weighting factor w1pref of the first antenna
is a constant, the PCI may include only information of the weighting
factor w2pref of the second antenna selected by the NodeB for
the UE. The same mapping relationship between the weighting factor
w2pref of the second antenna and PCI as shown in Table 1 is
pre-stored on the UE and the NodeB. For example, the PCI value is 1, and
the weighting factor w2pref of the second antenna is

[0041] To keep PCI information effective, the NodeB may periodically
generate a PCI for the UE and send the PCI to the UE. For example, the
NodeB may generate a PCI for the UE in each Transmission Time Interval
(TTI) and send the PCI to the UE through all or part of cells in the
E-DCH active set or the serving E-DCH radio link set. Definitely, the
NodeB may also generate a PCI for the UE according to other preset
periods and send the PCI to the UE through all or part of cells in the
E-DCH active set or the serving E-DCH radio link set, which is not
described here.

[0042] Step 202: The UE determines a target PCI according to statistics of
the PCIs and/or sources of the PCIs.

[0043] For example, when the multiple PCIs received in step 201 are sent
by all or part of cells in the E-DCH active set, the UE may determine the
target PCI in any of the following manners:

[0044] (1) The UE may collect statistics of cell signal strength of the
sources of the multiple PCIs, and if the strength of cell signals sent by
a certain cell is the strongest among all cells that have sent the PCIs,
determine the PCI sent by this cell as the target PCI.

[0045] (2) The UE may collect statistics of reception quantities of PCIs,
and if a certain PCI has the largest reception quantity, determine this
PCI as the target PCI. For example, the UE receives four PCIs, where the
value of two PCIs is 0, the value of one PCI is 1, and the value of one
PCI is 2, and then the UE may determine the PCI with the value of 0 as
the target PCI.

[0046] (3) The UE may collect statistics of the reception quantities of
the multiple PCIs and determine the target PCI with reference to the
sources of the PCIs. Specifically, if the UE finds that the reception
quantity of more than one PCI is the same and the largest among the
reception quantities of the PCIs, the UE determines the PCI sent by the
serving E-DCH cell in the PCIs of the largest reception quantity as the
target PCI.

[0047] For another example, if the PCI received in step 201 is sent by the
serving E-DCH cell, the UE may determine this PCI as the target PCI.

[0048] For another example, if the PCIs received in step 201 are sent by
all or part of cells in the serving E-DCH radio link set, because the
PCIs sent by cells in the serving E-DCH radio link set are the same, the
UE may first perform soft combination of the PCIs received from the cells
and then determine the PCI obtained through the soft combination as the
target PCI.

[0049] For another example, the UE may determine the target PCI from the
received PCIs in other manners. For example, different priorities are set
for the target PCI determining methods described above, and when PCIs are
received, the UE uses a feasible method of a high priority to determine
the target PCI, which is not further described here.

[0050] Step 203: The UE performs uplink MIMO sending control according to
the target PCI.

[0051] Specifically, if the UE side is configured with two antennas, when
there is uplink data to transmit, the UE may send two data blocks to the
network side through the two antennas using uplink MIMO technology. The
UE may send different uplink data through the two antennas or send the
same uplink data through the two antennas. When the UE sends the same
uplink data through the two antennas, the UE may use uplink closed-loop
transmit diversity technology to send the uplink data to the network side
through the two antennas.

[0052] For example, the UE performs uplink MIMO sending control on the two
data blocks according to the target PCI includes the following process.

[0053] The UE obtains the weighting factor w2pref of the second
antenna using the pre-stored Table 1 according to the target PCI, weights
the first data block according to the weighting factor w2pref
of the second antenna and the pre-stored weighting factor
w1pref of the first antenna, and then sends the data through
the two antennas.

[0054] The UE determines the weighting factor of the first antenna W3 and
the weighting factor of the second antenna W4 corresponding to the second
data block according to preset mapping relationships between
w1pref and w2pref corresponding to the first data
block and W3 and W4 corresponding to the second data block. For example,
the mapping relationships between w1pref/w2pref and
W3/W4 is: W3=w1pref and W4=-w2pref. Then, the UE
weights the second data block according to W3 and W4 and sends the data
block through the two antennas.

[0055] It should be noted that if the closed-loop transmit diversity is
adopted to bear data, only w1pref and W2pref are
required to weight the data.

[0056] Furthermore, in the embodiment of the present invention, when the
UE is in a soft handover process, the UE may communicate with multiple
cells. In step 202, the UE determines one target PCI and the cell that
sends the target PCI can receive data normally. To enable other cells to
acquire the target PCI determined by the UE, to receive data normally,
and to utilize an uplink macro diversity gain, after step 202, the UE may
send the determined PCI to the network side and the network side stores
information of the received target PCI.

[0057] With the information processing method provided in the embodiment
of the present invention, the UE can receive PCIs and determine a target
PCI from the received PCIs, and perform uplink MIMO sending control
according to the target PCI, so that the UE can use the multi-antenna
technology to send uplink data, which effectively increases the
transmission rate of uplink data and reduces the delay in data
transmission.

[0058] As shown in FIG. 3, an embodiment of the present invention provides
a UE which can implement the information processing method provided in
the foregoing embodiments of the present invention. The UE includes:

[0059] a receiving unit 301, configured to receive PCIs;

[0060] a determining unit 302, configured to determine a target PCI
according to statistics of the PCIs received by the receiving unit 301
and/or sources of the PCIs; and

[0061] a controlling unit 303, configured to perform uplink MIMO sending
control according to the target PCI determined by the determining unit
302.

[0062] Optionally, the receiving unit 301 may be configured to receive
multiple PCIs sent by all or part of cells in an uplink E-DCH active set.
Accordingly, the determining unit 302 is configured to collect statistics
of cell signal strength of the cells sending the multiple PCIs received
by the receiving unit 301 and determine the PCI sent by the cell of the
strongest cell signal strength as the target PCI. The determining unit
302 may be further configured to collect statistics of the reception
quantities of the multiple PCIs received by the receiving unit 301 and
determine the PCI of the largest reception quantity as the target PCI.
The determining unit 302 may be further configured to collect statistics
of the reception quantities of the multiple PCIs received by the
receiving unit 301 and if more than one PCI of the largest reception
quantity exists, determine the PCI sent by a serving E-DCH cell in the
PCIs of the largest reception quantity as the target PCI.

[0063] Optionally, the receiving unit 301 may be configured to receive a
PCI sent by the serving E-DCH cell; and the determining unit 302 may be
configured to determine the PCI received by the receiving unit 301 as the
target PCI.

[0064] Because the PCIs sent by cells in a serving E-DCH radio link set
are the same, optionally, the receiving unit 301 may be configured to
receive multiple PCIs sent by all or part of cells in the serving E-DCH
radio link set; and the determining unit 302 may be configured to perform
soft combination of the multiple PCIs received by the receiving unit 301
and determine the PCI obtained through the soft combination as the target
PCI.

[0065] Optionally, the UE may further include:

[0066] a sending unit 304, configured to send the target PCI determined by
the determining unit 302 to a network side.

[0067] The UE provided in the embodiment of the present invention can
receive PCIs and determine a target PCI from the received PCIs, and
perform uplink MIMO sending control according to the target PCI, so that
the UE can use the multi-antenna technology to send uplink data, which
effectively increases the transmission rate of uplink data and reduces
the delay in data transmission.

[0068] As shown in FIG. 4, an embodiment of the present invention provides
an information processing system, which can implement the information
processing method provided in the foregoing embodiments of the present
invention. The system includes a UE 601 which is connected to at least
one NodeB 602 in a communicable mode. For example, the UE 601 establishes
a wireless connection with the cell under one NodeB in a communicable
mode.

[0069] In the system, the UE 601 is configured to receive PCIs from NodeBs
602, determine a target PCI according to statistics of the PCIs and/or
sources of the PCIs, and perform uplink MIMO sending control according to
the target PCI.

[0070] For example, the UE 601 may receive multiple PCIs sent by all or
part of cells in an E-DCH active set. Then, the UE 601 may collect
statistics of cell signal strength of these cells and determine the PCI
sent by the cell of the strongest cell signal strength as the target PCI;
or the UE 601 may collect statistics of the reception quantities of the
PCIs and determine the PCI of the largest reception quantity as the
target PCI; or the UE may first collect statistics of the reception
quantities of the PCIs and then, if more than one PCI with the largest
reception quantity exists, determine the PCI sent by a serving E-DCH cell
in the PCIs of the largest reception quantity as the target PCI.

[0071] For another example, the UE 601 may receive a PCI sent by the
serving E-DCH cell and determine the PCI as the target PCI.

[0072] For another example, the UE 601 may receive multiple PCIs sent by
all or part of cells in a serving E-DCH radio link set and perform soft
combination of the PCIs, and determine the PCI obtained through the soft
combination as the target PCI.

[0073] With the information processing system provided in the embodiment
of the present invention, the UE can receive PCIs and determine a target
PCI from the received PCIs, and perform uplink MIMO sending control
according to the target PCI, so that the UE can use the multi-antenna
technology to send uplink data, which effectively increases the
transmission rate of uplink data and reduces the delay in data
transmission.

[0074] Persons skilled in the art understand that all or part of the steps
in the methods provided in the foregoing embodiments of the present
invention can be implemented by hardware under the instruction of a
program. The program may be stored in a computer readable storage medium,
such as a Read Only Memory (ROM), a Random Access Memory (RAM), a
magnetic disk, or a Compact Disk-Read Only Memory (CD-ROM).

[0075] Detailed in the foregoing are only exemplary embodiments of the
present invention, but the protection scope of the present invention is
not limited thereto. Any modification or substitution readily conceivable
by persons skilled in the art within the scope of the technology
disclosed herein shall fall within the protection scope of the present
invention. Therefore, the scope of the present invention is subject to
the appended claims.